- D4 (Octamethylcyclotetrasiloxane) D4

- D5 (Decamethylcyclopentasiloxane) D5

- D6 (Dodecamethylcyclohexasiloxane) D6

Ukukhawulelwa kwe-D4 ne-D5 Emikhiqizweni Yokunakekela Umuntu:

I-Octamethylcyclotetrasiloxane (D4kanye ne-decamethylcyclopentasiloxane (D5) zengezwe kuFIKA uhlu lwezinto ezikhawulelwe zesijobelelo XVII(ukungena 70) nguUMTHETHO WEKHOMISHINI (EU) 2018/35ku10 Jan 2018.I-D4 kanye ne-D5 ngeke zibekwe emakethe emikhiqizweni yezimonyo ewashwayo ngokuhlangana okulingana noma okukhulu kune.0.1%ngesisindo sanoma iyiphi into, ngemva31 Januwari 2020.

Kungani i-D4 ne-D5 Ikhawulelwe?

I-D4 ne-D5 ama-cyclosiloxanes ikakhulukazi asetshenziswa njengama-monomers ekukhiqizeni i-silicone polymer.Futhi banokusetshenziswa okuqondile emikhiqizweni yokunakekelwa komuntu siqu.I-D4 ikhonjwe njenge-ai-bioaccumulative, i-bioaccumulative kanye ne-toxic (PBT) ephikelela kakhulu ye-bioaccumulative (vPvB).I-D5 ikhonjwe njengento ye-vPvB.

Ngenxa yokukhathazeka ngokuthi i-D4 ne-D5 ingase ibe namandla okunqwabelana emvelweni futhi ibangele imiphumela engalindelekile futhi engenakuhlehliswa esikhathini eside, i-ECHA's Risk Assessment (RAC) kanye ne-Socio Economic.Amakomiti Okuhlola (SEAC) avumelana nesiphakamiso sase-UK sokukhawulela i-D4 ne-D5 emikhiqizweni yokunakekelwa komuntu siqu ewashwayo ngoJuni 2016 njengoba ingase yehle ngomsele futhi ingene emachibini, emifuleni, nasezilwandle.

Ukusetshenziswa Okukhawulelwe kwe-D4 ne-D5 Kweminye Imikhiqizo?

Kuze kube manje i-D4 ne-D5 azikhawulelwe kweminye imikhiqizo.I-ECHA isebenza ngesiphakamiso esengeziwe sokukhawulela i-D4 ne-D5 ngaphakathishiya emikhiqizweni yokunakekelwa komuntu siqunokunyeumthengi/imikhiqizo yobungcweti(isb ukuhlanza okomile, amawakisi nokupholisha, ukuwasha kanye nemikhiqizo yokuhlanza).Isiphakamiso sizohanjiswa ukuze sivunywe kuEphreli 2018.Imboni izwakalise ukuphikisa okuqinile kulo mkhawulo owengeziwe.

KuMashi 2018, i-ECHA iphinde yahlongoza ukwengeza i-D4 ne-D5 ohlwini lwe-SVHC.

Ireferensi:

• UMTHETHO WEKHOMISHINI (EU) 2018/35
• IKomidi Lokuhlola Ubungozi (i-RAC) Ligunyaza Isiphakamiso Sokukhawulela Ukusetshenziswa Kwe-D4 kanye Ne-D5
• Izimonyo zokugeza
• Izinhloso Zokukhawulelwa kwe-D4 ne-D5 Kweminye Imikhiqizo
• I-Slicones Europe - Imikhawulo eyengeziwe ye-REACH ye-D4 ne-D5 ingaphambi kwesikhathi futhi ayithetheleleki - Juni 2017

Yini ama-silicones?

Ama-Silicone yimikhiqizo ekhethekile esetshenziswa kuzinhlelo zokusebenza ezingamakhulu lapho kudingeka khona ukusebenza kwawo okukhethekile.Asetshenziswa njengezinto zokunamathisela, afaka i-insulate, futhi anokumelana okuhle kakhulu kwemishini/i-optical/thermal phakathi kwezinye izakhiwo eziningi.Zisetshenziswa, isibonelo, kubuchwepheshe bezokwelapha, amandla avuselelekayo kanye nezixazululo zokonga amandla, kanye nobuchwepheshe bedijithali, ukwakhiwa nokuhamba.

Yini i-D4, i-D5 ne-D6 futhi isetshenziswa kuphi?

I-Octamethylcyclotetrasiloxane (D4), i-Decamethylcyclopentasiloxane (D5) kanye ne-Dodecamethylcyclohexasiloxane (D6) isetshenziselwa ukwakha uhla oluhlukahlukene lwezinto ze-silicone ezihlinzeka ngezici eziyingqayizivele, ezizuzisayo ezinhlobonhlobo zezicelo nemikhiqizo kuyo yonke imikhakha, okuhlanganisa ukwakhiwa, ugesi, ubunjiniyela, ukunakekelwa kwezempilo. , izimonyo nokunakekelwa komuntu siqu.

I-D4, i-D5 ne-D6 isetshenziswa kakhulu njengezinkambi zamakhemikhali, okusho ukuthi izinto zisetshenziswa enqubweni yokukhiqiza kodwa zikhona kuphela njengokungcola okusezingeni eliphansi emikhiqizweni yokugcina.

Isho ukuthini i-SVHC?

I-SVHC imele “Into Ekhathaza Kakhulu”.

Ubani owenza isinqumo se-SVHC?

Isinqumo sokuhlonza i-D4, i-D5, i-D6 njenge-SVHC senziwe iKomidi Lamazwe Angamalungu e-ECHA (i-MSC), elakhiwe ochwepheshe abaqokwe Amazwe Angamalungu e-EU kanye ne-ECHA.

Amalungu e-MSC acelwe ukuthi abuyekeze imibhalo yezobuchwepheshe ethunyelwe yiJalimane ye-D4 ne-D5, kanye ne-ECHA ye-D6, kanye nemibono etholwe ngesikhathi sokubonisana nomphakathi.

Igunya lalaba chwepheshe ukuhlola nokuqinisekisa isisekelo sesayensi esisekela iziphakamiso ze-SVHC, hhayi ukuhlola umthelela ongaba khona.

Kungani i-D4, i-D5 kanye ne-D6 zifakwe ohlwini lwe-SVHC?

Ngokusekelwe kumbandela wokunquma osetshenziswe ku-REACH, i-D4 ihlangabezana nemibandela ye-Persistent, Bioaccumulative and Toxic (PBT) izinto, futhi i-D5 ne-D6 ihlangabezana nemibandela yezinto Eziphikelela kakhulu, ze-Bioaccumulative (vPvB) kakhulu.

Ngaphezu kwalokho, i-D5 ne-D6 ibhekwa njenge-PBT uma iqukethe ngaphezu kuka-0.1% D4.

Lokhu kuholele ekuphakanyisweni Kwamazwe Angamalungu e-EU ohlwini lwama-SVHC.Kodwa-ke, sikholelwa ukuthi imibandela ayikuvumeli uhla olugcwele lobufakazi besayensi obufanelekile ukuthi bucatshangelwe.